X-Ray crystal structures of µ4-chloro-{tris[trichloro(thiosemicarbazide)-bismuth(III)]}[tris(thiosemicarbazide)bismuth(III)] hexachlorobismuthate(III) chloride and catena-µ-chloro-dichlorobis(ethylenethiourea)-bismuth(III)

Abstract

The crystal structures of the title complexes (1) and (2) have been determined by three-dimensional Patterson–Fourier and least-squares methods based on X-ray (MO-K_α) diffraction data. Crystal data are: (1), a= 14.056(5), c= 39.571(14)Å, Z= 9, space group R, R 0.0740; (2), a= 9.595(1), b= 17.445(2), c= 8.678(1)/Å, β= 96.72(1)°, Z= 4, space group C2/c, R 0.049. The structure of (1) consists of an octahedral [BiCl₆]^3– anion, a chloride ion, and a tetramer [Bi₄Cl₁₀(tsc)₆]²⁺(tsc = thiosemicarbazide), formed by an octahedral µ₃-chloro-tris-[trichloro(thiosemicarbazide) bismuthate(III)] anion and a tris(thiosemicarbazide) bismuth(III) cation, in which the co-ordination of the metal is trigonal antiprismatic. In (2) the co-ordination at bismuth is octahedral involving two ethylenethiourea molecules and four chloride ions, two of them bridging adjacent bismuth atoms forming infinite zigzag chains running along [001].